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Green Laser Stack help

threesixty.je

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Hello all

I have a STack laser currently listed on ebay as untested because i have no idea of what power supply i need to test

i attached two pictures in case someone recognises this.
This came out of a Medical laser machine and the output power was 120W of green.

I am not sure what makes it green.. may be the optics and that small crystal in front of it or it may be the end pumped cavity i also have..

Anyway, i was wondering if anyone could assist with testing this item.. i just want to see if it works.. it does not have to be at full power.. just so i can add tis information to my listing..

Anyone's assistance would be apreciated

Regards

Marco
s-l1600-1.jpg
s-l1600-2.jpg
 



Alaskan

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This is probably a Near-IR output at 808 nm, when at the operating temperature. I don't know the voltage, depends upon how many diodes are in each stack. The green output comes from a non-linear crystal the IR output from this diode stack is focused into, this won't put out green itself.
 

threesixty.je

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thanks for your reply
this is the complete laser table assembly i dismantled..

I donlt even understand what all the parts do :).. wish i did


Screenshot 2020-02-05 at 21.18.13.jpg
Where is the green colour being generated?

on that long bit which has a rod inside?

this setup is a little strange because instead of side pumped is end pumped?
 

paul1598419

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I thought you were missing some parts. I wouldn't just dissemble the whole laser optical table as you need the temperature control as well as the other optics to get a stable 532nm DPSS green out of it.
 

threesixty.je

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I thought you were missing some parts. I wouldn't just dissemble the whole laser optical table as you need the temperature control as well as the other optics to get a stable 532nm DPSS green out of it.
Ha

too late now..
It’s all in parts..
Indo have every part still...
 

paul1598419

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Ouch! Wouldn't be easily aligned after you removed all the parts.
 

threesixty.je

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Yep. A challenge
My objective was to provide all them as spare parts for anyone needing them in the next few years if ever

I just wish I could test the diode somehow
I ended up misplacing the original power supply and ended up being dismantled for recycling by mistake so now I don’t know what to do to to Test this
 

Cyparagon

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You'll need a high current low voltage constant current power supply. If those rows are in series, my wild guess would be just under 14V at maybe 60-100A.

If you're just looking for basic functionality, threshold current could be as low as 10A. You'll need a plan to view IR. There are detector cards, GITD substance options, cameras, or a few other avenues. Of course. It should go without saying this should not be operated without cooling for longer than a few seconds. Oh, and please take care to avoid the IR beam.
 

threesixty.je

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That’s cool thanks
Also thank you for the safety advise. I have plenty of protection methods

I am actually in the process of building a chamber for laser testing with swappable windows for the various wavelengths
I have all the glasses etc in the meantime
 

Cyparagon

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Although not related to the pump testing, the good folks at Discord have gathered some additional info for anyone curious.

Styropyro has determined this is a laserscope greenlight HPS laser.

DashApple sourced the following image from a blog post:



And Diachi has labeled the beam path:

 

diachi

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Although not related to the pump testing, the good folks at Discord have gathered some additional info for anyone curious.

Styropyro has determined this is a laserscope greenlight HPS laser.

DashApple sourced the following image from a blog post:



And Diachi has labeled the beam path:

I *think* that's the beam path. I feel like I'm missing something on the output end (green), but I'm confident on the cavity layout (red/yellow). Good old Z-fold. Q-switch on the long (middle) arm. KTP on the top arm, gain crystal on the bottom arm (Could be YAG or Nd:YVO4 can't say for sure). OC at the fold on the bottom right where red/yellow/green meet. Didn't bother including the pump path, that's fairly obvious.
 

threesixty.je

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It makes sense to me but again I have no idea of what most of these optics do :)

I just think that each piece is incredibly well built

really impressive machining and engineering
 




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